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Contains:  IC 1275, NGC 6559, IC 1274, IC 4685, NGC 6544, NGC 6546, NGC 6530, M 21, NGC 6531, M 8, Lagoon nebula, Hourglass nebula, NGC 6523, NGC 6526, Trifid nebula, M 20, NGC 6514, The star 9Sgr, The star 7Sgr
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M8+M20

Technical card

Resolution: 5208x3476

Dates:April 30, 2017

Frames: 31x300"

Integration: 2.6 hours

Avg. Moon age: 4.58 days

Avg. Moon phase: 21.91%

Astrometry.net job: 1561863

RA center: 18h 5' 43"

DEC center: -23° 35' 49"

Pixel scale: 2.697 arcsec/pixel

Orientation: 87.428 degrees

Field radius: 2.345

Locations: YuanFeng Parking lot of Mount Hehuan, Nantou County, Taiwan

Description

M8+M20 @梅峰 (標高 2190 米左右) on 2017.04.30 凌晨

當晚濕度超高,85%,氣溫 8 度C 左右,到了凌晨 4 點左右,大約降到 72%,氣溫 6 點多度C。

原本 20:20 抵達後,搬了好多箱設備、架好設備後,想試試 C8HD 直焦 + ZWO ASI 1600MM-Cool,無奈 一直對不到焦 + 除霧搞不定... C8HD 修正鏡面的結霧始終存在,試到 23:00 多,除霧問題一直無法解決,只好放棄,改用 B 計畫 -- FSQ-85ED x 0.73 減焦 + Canon 650D(改,無光暈版)。

這組合是目前手上機絲當中,個人最熟悉、也是穩定度最高的組合。快速地換上 B 計畫之後,要拍什麼呢?顯然 M8+M20 最適合這個焦段了.... ^^

FSQ-85ED x 0.73 減焦 + Canon 650D(改,無光暈版) on Vixen SXP

M-Gen + APM 60240 導星(M-Gen 首次出任務,只能說「他XX的後悔太晚買了....」、「真他X的太方便好用了...」)

ISO 800 / 300s x 31 / Dark x 10 / Flat x 10
DSS 3.4.4 / Photoshop CC / Camera Raw

這張的構圖跟 2017.04.02 凌晨@鳶峰 拍得幾乎一模一樣,改天來把這兩組圖疊疊看,看能否有更多細節與更純淨的背景...(背景?這個天區應該有幾億顆恆星吧?我應該區分不出來是星點還是雜訊了... ^^ )

Comments

Author

eyeofra
Lee, Chi-Hsiang
License: None (All rights reserved)
3093
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M8+M20, 





    
        

            Lee, Chi-Hsiang